IP2022 Data Sheet www.ubicom.com 103 7.3.20    XCFG Register 7 6 5 4 3 2 1                                                                                                    0
GIE  FWP  RTEOS  RTOSC_EN  INT_EN Rsvd  FBUSY Figure 7-1  XCFG Register Name Description GIE Global interrupt enable bit 0 =   Interrupts disabled
1 =   Interrupts enabled FWP Flash write protect bit. This bit only
affects operation of the self-program-
ming instructions, not programming
through the ISD/ISP interface. 0 =   Writes to flash memory dis-           abled
1 =   Writes to flash memory enabled RTEOS Real-time timer oversampling bit 0 =   Oversampling disabled
1 =   Oversampling enabled RTOSC_EN RTCLK oscillator enable bit 0 =   RTCLK oscillator is opera-           tional
1 =   RTCLK oscillator turned off INT_EN int instruction interrupt enable bit 0 =   int instructions only incre-           ment the PC, like nop
1 =   int instructions cause inter- rupts FBUSY Flash memory busy bit (read-only) 0 =   Flash memory is idle
1 =   Flash memory is busy with a previous operation